JPH02246051A - Operation and displaying device for video tape recorder - Google Patents

Abstract

PURPOSE:To easily perform a direct operation regardless of the presence/absence of knowledge for a television standard system by performing the light emitting display of the name of a desired nation or that of the television standard system based on the instruction of a switch group, and controlling the operation of a video tape recorder to a desired conversion operation. CONSTITUTION:A conversion circuit 5 to perform the conversion of signals with different television standard systems is incorporated in a VTR, and connection to a servo system or a video signal processing system is effectively switched, and a display part 10 which light-emits the name of the desired nation or that of the television standard system by instructing them from a control panel, by which an instructed nation or system can be recognized is provided. And a circuit 31 which automatically selects the television standard system corresponding to the instructed nation or system is provided. In such a way, it is possible to easily perform an operation for the reproduction of a tape recorded by the television standard system different from that of its own nation or recording with the standard system different from that of its own nation by every user.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is applicable to a video tape recorder (hereinafter referred to as a VTR) that records or plays back a video signal, by converting between different television standard formats. The present invention relates to a video tape recorder capable of creating a standard format recording tape and outputting a desired television standard format signal.

BACKGROUND OF THE INVENTION Television standard systems in various countries around the world are not unified, and several types of signal formats are used.

The representative television standard system is the NTSCi system.

It is well known that there are three types, the PAL system and the SRCAM system, and systems that are slightly modified from these systems. The three typical video signal formats are as follows. N
The TSC method is interlaced scanning at 3o frames per second (field frequency 60 cycles), and the number of frame scanning lines is 62.
6 lines, color signal carrier frequency 3.579M) lz is basic, PAL system has 26 frames per second interlaced scanning (field frequency 60 cycles), number of frame scanning lines 626, color signal carrier frequency 4.433M
)4z is the basic system, and the SECiAM system is almost the same as the PAL system except that the color signal is transmitted as two color difference signals line sequentially and by frequency modulation.

Now, home VTRs are generally designed and shipped to conform to the television standard system of the consumer country.For example, in Japan and the United States, they are compatible with NTSC signals, and the rotational frequency of the rotating head is the field frequency. 60) 1z
The signal 262.5H (1 field per track)
H indicates 1 line), and the color signals are s, s
-r e Mt-1z carrier color signal 629K)lz
It is configured to perform low frequency conversion and record. In addition, for PAL regions such as Germany and China, the rotation frequency of the rotating head is set to 50 Hz to match PAL signals, 312.6 H worth of signals are recorded on one track, and the color signal is 4.0 Hz.
It is configured to low-pass convert the carrier color signal of 433111z to 627K)lz. Furthermore, for France etc.
Countdown (branch) to convert the frequency modulated color signal to low frequency in order to make it compatible with the KCAM system.
It is configured so that it can be recorded. The reproduced output signal is also configured to be output in the same signal format as the television receivers of each country conform to the television standard system adopted in each country.

However, in some regions in Europe where both PAL and SICCAM can be received, and in regions such as the Middle East and Southeast Asia where sources of multiple standards coexist, VTRs that support multiple television standards are being shipped. .

In this way, home VTRs are configured to be compatible with the television standard system of the region, so for example, it is possible to play back a tape recorded in the PAL system using a VTR and television receiver commonly available in Japan. It was impossible to watch the film in Germany, or to play a tape recorded in the NTSC format on a domestic VTR and television receiver in Germany. Furthermore, even if the VTR is compatible with multiple television standard formats, such as those used in the Middle East, it is possible to play back and watch tapes recorded in multiple formats.
It was impossible to record an NTSC source in the PAL format or convert the standard format to another format.

Problems that the invention aims to solve Recently, there has been a trend towards dualization of information in the world, and there is a growing need to freely exchange images internationally. As mentioned above, current home VTRs are inadequate to meet these needs. Furthermore, the names of TVIL standard formats such as NTSC, PAL, and SKCAM are not familiar to general users, and it is common for them to have no knowledge of which formats are used in which countries. It is convenient for those who are using television standards to use television standard system names. When considering a VTR that converts the television standard format for recording and playback, the switch for instructing the format conversion operation and its display method become extremely important.

In view of the above-mentioned problems, the present invention incorporates a conversion circuit for converting between signals of different television standard systems in a VTR, effectively switches connections with a servo system and a video signal processing system, and enables a desired country name or television If you specify the standard method name from the operation panel, the name of the country or standard method will light up, and it will be equipped with a display section that allows you to see at a glance which country or method is specified. A circuit that automatically selects the television standard format should be provided, and any user who plays back tapes recorded in a television standard format different from that of his or her home country or records in a television standard format other than that of his or her home country should be provided. To provide a video tape recorder that can be easily operated even when

Means for Solving the Problems In order to solve the above problems, the video tape recorder of the present invention includes a servo system and a video signal processing system capable of recording or reproducing a plurality of television standard format signals.
and a mode converting circuit that converts one television standard format signal to another television standard format signal, and converts the input television standard format signal into another television standard format signal and records it. or a mode that converts the reproduced television standard format signal to another television standard format signal and outputs it, a group of operation switches with the name of the country or the name of the TVIL standard format, and a target country or TV from that switch group. Equipped with a display section that emits light to display the name of the country or standard system specified by the instruction of the television standard system name, and a system selection circuit that selects the corresponding television standard system, and converts the system based on the output of the system selection circuit. It is configured to control the conversion operation of the circuit.

Function The present invention is constructed as described above so that when the operator specifies the name of a desired country or TVIL standard system, the corresponding country name or standard system name is displayed with light emission and a conversion operation is performed. It enables you to record signals of different standard formats and output signals of different standard formats, and allows you to easily and directly operate recording tapes of a format other than your own country's standard format, regardless of whether you have knowledge of television standard formats. This allows tapes recorded in other countries to be played back on a television receiver in one's own country, making it possible to unify international video information via a VTR.

Embodiment Below, a video tape recorder according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the video tape recorder of the present invention.

(ml is the recording system, 1 is the antenna terminal, 2 is the tuner, 3 is the video input terminal, 4 is the input switch, 6
1 is a system conversion circuit, 10 is a switch display panel operated by the user, and 31 is a system selection circuit for selecting a television standard system according to the target country. 6 is a recording processing system of the VTR, 7 is a video output terminal, 8 is a rotary head, and 9 is a servo system. Further, 36 is an RF converter whose output is a small RF output and is connected to the terminal 36. (b) shows a reproduction system, in which a reproduction processing system 11 is arranged between the rotary head 8 and the system conversion circuit 6.

The operation of the video tape recorder configured as above will be explained. Assuming that this video tape recorder will be used in Japan, we will first explain the operation of the ILI recording system.TV radio waves input from the antenna terminal 1 are tuned and demodulated by the tuner 2, and the so-called NTS
The signal appears at the TI terminal of the input selector switch 4 as a C-type composite signal. Now, assuming that a television signal is selected with the input selector switch 4, the NTSC signal is applied to the format conversion circuit 6. The format conversion circuit 5 is a circuit that realizes mutual conversion between television standard formats based on the output of the format selection circuit 31. For example, the format selection circuit 31
If C is selected, the input to the format conversion circuit 6 is an NTSC signal, so the format conversion circuit 6 enters a pass state and outputs the NTSC signal as it is. Then, a command to output an NTSC signal is transmitted to the servo system 9 and the recording processing system 6. Therefore, the servo system 9 is NTSC
Capstan motor for signal recording.

A control signal is supplied to each control head for recording cylinder control signals equipped with a rotating head. Further, the recording processing system 6 receives the NTSG signal and performs appropriate processing such as emphasis and frequency modulation in order to record it with the rotary head 8. At this time, video output terminal 7
An NTSC signal, which is an input to the format conversion circuit 6, is output to. The RF signal 2 converted by the RF converter 36 is still output to the terminal 36. In this way, the method selection circuit 3
When No. 1 selects NTSC, the operation is exactly the same as that of conventional Japanese domestic VTRs.

Next, if the system selection circuit 31 selects the PAL system, the system conversion circuit 6 converts the input NTSC signal into a PAL system.
The servo system 9 and the recording processing system 6 are converted into signals, and the servo system 9 and the recording processing system 6 are
Operates to record AL signals. Therefore, the NT input to antenna terminal 1 and tuned and demodulated by the tuner
The SC signal is recorded on the magnetic tape by the rotary head 8 in the PMU signal format. At this time, the iTsc signal (before conversion) is output to the video output terminal 7, and can be monitored with a normal NTSC receiver in Japan.

As described above, it is possible to create a recording tape in the PAL system, which is different from the NTSC television standard system that is being broadcast.

Further, when the input selector switch 4 selects a video signal, the signal applied to the video input terminal 3, for example, a playback signal from another VTR, can be converted into a PAL signal by the format conversion circuit 6 and recorded. As a result, video information recorded in the NTSC system can be dubbed in the PAL system.

In the above description, the system selection circuit 31 for selecting the television standard system is driven by a command from the switch display spring MO. The switch display panel 10 displays the name of the country and the name of the television standard system existing in the world, and if the user operates the country name: USA, for example, the system selection circuit 3 is displayed.
If fT8c (based on 1) is selected and another country name: West Germany is operated, the system selection circuit 31 selects PAL.

Further, if the standard method operator is directly operated, that method is selected by the method selection circuit 31. Therefore, the user only has to select either the name of the television standard system or the name of the target country using the switch display panel 1o. In this case, the switch display panel 10 has a light-emitting display section so that the designated country name or standard method name is illuminated when the switch is operated.
The system is designed to allow the operator to confirm which country name or standard method is specified, making it easier and more reliable to operate.

In the above explanation, conversion from the NTSC system to the PAL system has been explained, but the reverse and conversion between other systems including the SICCAM system can also be easily realized with this configuration.

The operation of the reproduction system in (b) is as follows.

Assuming that a tape recorded in the PAL system is played on this VTR, the signal is picked up by the rotary head 8, processed by the playback processing system 11 such as de-emphasis and FM demodulation, and the output is a PAL signal that is played back. be done. In this case, the determination of which television standard format the recorded signal is based on is normally performed automatically by measuring the field frequency, and the command is given to the reproduction processing system 11 and servo system 9. It will be done. Now, since television receivers in Japan are compatible with the NTSC system, even if you monitor this reproduced PAL signal as it is, you will not get a normal image; either no image will appear, or even if it does, it will be a very unsightly image. It ends up.

Therefore, when "Japan" is operated on the switch display panel 1o, the NTSC system is selected by the system selection circuit 31, the command is transmitted to the system conversion circuit 6, and the system conversion circuit 6 receives the reproduced PAL signal given to its input. NTS
It is converted into a C signal and output to the video output terminal 7. As a result, if the video output terminal is connected to the video input terminal of the NT3G receiver, the image can be viewed as a normal image.

Also, since RF output is obtained at terminal 36, it @NTS
It can also be viewed by connecting it to the antenna terminal of a C receiver.

In other words, it becomes possible to properly monitor a tape recorded in the PAL system using an NTSC receiver. Mochi 7) NNT
Conversion between SC and other television standards including PAL or SKCAMi can be easily performed.

FIG. 2 is an example of the switch display panel 1o in FIG.
Television standard system names such as SC and PAL are arranged. A touch switch is arranged below the country name and standard method name, and the structure is such that it can detect which country name or standard method name the operator pressed. In addition, a light-emitting element is placed below the switch for the country name and standard system name, so that the country name or standard system name that the operator presses will emit light, so the operator can select the country name or standard system name that matches his or her desired instructions. You can check whether the

Since a world map is displayed on the switch display panel 10, when the operator selects a desired country, the user can quickly and easily find the desired country, compared to a case where only the country name is displayed.

FIG. 3 is an exploded perspective view showing the basic structure of the switch display panel 10, which has a structure in which a transparent electrode touch switch sheet B, an IEI, and a light emitting plate C are superimposed on a printed film. On the printing film, the names of countries such as Japan, Germany, and France and the names of standard systems such as NTSC and PAL are printed on a transparent film. Sheet B is a switch in which transparent electrodes are arranged on a transparent film, and has an X output and a Y output as shown by the broken line in the figure, and when the operator presses the specified number of times from above printed film A, the and the Y row electrode are in contact with each other. This state can be electrically detected from the X output and Y output. C is electroluminescence, and the black colored part is an electrode, and by applying an alternating current voltage between this electrode and 1HD, only the part where the electrode is located selectively emits light. In this example, 1 Japan” and “NTS
G'' is connected and output as an NTSC terminal, so if an AC voltage is applied between the NT8C terminal and GND, the ``Nippon'' and ``NTSC'' portions on the film will emit light. Therefore, if the country name on the printed film A is pressed, the country name is detected by the touch switch sheet B and a key matrix circuit including a microcomputer, and if the output is configured to turn the drive voltage of the KL light emitting board C ON-OFF, the switch and It is possible to realize a function that emits light at the same time and continues to emit light while in use.Also, by forming the printed film so that the name of each country is color-coded by standard method, it is possible to display the groups of each method by color. .

Of course, the light emitting section can be constructed using not only electroluminescence but also liquid crystal or light emitting diode.

FIG. 4 is a block diagram showing an embodiment of the system conversion circuit 5 in FIG. 1. The composite video signal applied to the input terminal 12 is separated into a luminance signal and a color signal by the Y-C separation circuit 13, the luminance signal is digitized by the Muro converter 14 and applied to the memory 2°, and the color signal is sent to the decoder 1.
NTSC by 6.

The signals are demodulated according to methods such as PAL and SECAM to become color difference signals, which are digitized by the AI converter 16 and applied to the memory 2o. The memory 20 is a digital memory in units of fields, and is controlled by a memory control circuit 21, and its write clock is input from an input signal to a low-pass filter 17. A clock generator 19 based on the synchronization signal obtained by the synchronization separation circuit 18
Use the one generated in . Further, a read clock is provided from a clock generator 22. Of the digital signals that have undergone format conversion processing in the memory 2°, the luminance signal is returned to analog in the D-mucon bark 23, and the color difference signal is returned to analog in the D-mucon bark 24, and then sent to the encoder 26.
NTSC, PAL.

It is modulated into a carrier color signal compatible with various television standards such as SECAM. The mixer 26 mixes the luminance signal and the carrier color signal, and outputs a system-converted composite signal to the output terminal 27.

The format conversion operation is performed as follows. Now, NTS
Consider conversion from C to PAL. In NTSC, the field frequency is 60) (the number of scanning lines in z・1 field is 625)
/2, and FAI is 60Hz and 625/ respectively.
Since there are two lines, it is necessary to convert the field frequency and the number of scanning lines. Therefore, the memory 20 is configured to write a signal for one field at a predetermined clock and store it in memory, and read it out at a clock independent of the writing.

Then, the memory control circuit 21 receives a signal from NTSC to PA.
When a conversion command to L is received, 60 fields of NTSC are read out as 60 fields of PAL for field frequency conversion. In other words, this can be achieved by controlling the memory to skip at a rate of 1 field for every 6 fields. Also, the number of scanning lines is converted from 526/2 to 62
Since it is necessary to make 5/2 lines, this can be achieved by interpolating from the previous and next scanning line information using the line memory in the memory 20 to create new scanning line information IN. Such control is performed by selecting or calculating information in the memory using control signals from the memory control 21.

Conversely, in conversion from PAL to NTSC, field frequency conversion is performed by reading one field twice at a rate of once every six fields, and conversion of the number of scanning lines can be realized by thinning out or calculating the scanning line information.

Also, the 8KCAM system has a field frequency of 1. The number of scanning lines is the same as that of the PAL system, but the difference is that the color signal undergoes FM modulation and is multiplexed sequentially, so it can be realized by processing the color signal taking this point into account.

It can be easily inferred that, in addition to the method explained in FIG. 3, more advanced format conversion can be realized by adding memory and performing interpolation between fields and frames.

FIG. 6 is a block diagram showing another embodiment of the present invention, in which the system conversion circuit 6 and the switch panel 10° system selection circuit 31 arranged separately for the recording system and the reproduction system in FIG. It is configured so that it can be shared by the playback system, the recording and playback processing circuit 28 is also generally realized by switching internal circuits, so it is configured that way, and the tuner/R
The difference is that the F converter is removed and only the video input/output terminal is used. As explained in FIG. 1, the recording/playback switch (R/P switch) switches the processing of the recording/playback processing circuit 2B and also switches the input to the format conversion circuit 6 and the output to the video output terminal. Similarly, it realizes recording and playback of different television standard formats.

FIG. 6 shows a specific circuit example of the switch display panel 1° and the method selection circuit 31 according to the present invention, and the switch display panel 1o surrounded by a broken line has switches a, b,
A plurality of c, . Also NTSC
, switch X corresponding to the standard method such as PAL, 7.
Z is also input to each OR gate. For example, “B book”
When the switch b corresponding to
9H", which means that the system selection switch has selected NTSC.Similarly, switches d, e, and f in countries that use the PAL system are input to the OR gate 33, and the SIECAM
Switches g and h of countries adopting the system are input to the OR gate 34.

Also, when the direct standard method switch X is closed, the OR gate 3
2 output t -RH'9 tL, Nrsc method e is selected. As described above, the system selection circuit can be realized with a simple configuration, and the operation of the conversion circuit and the display section can be controlled depending on the way the circuit is developed.

Effects of the Invention As described above, the present invention provides a video tape recorder that is equipped with a servo system and a video signal processing system that can record or reproduce a plurality of television standard format signals, and that can record or reproduce a single television standard format signal. It is equipped with a format conversion circuit that converts the input television standard format signal to another Ten Vision standard format signal and records it, or the reproduced television standard format signal is converted to another TV standard format signal. A switch panel displays the name of the country and the television standard format, including a mode for converting to a television standard format signal and outputting the signal, and the corresponding television standard format is displayed based on the target country or television standard format signal from the switch panel. In addition to being equipped with a system selection circuit that automatically selects the system, it is possible to use PA for television broadcasts in Japan with simple and easy-to-understand operations and display methods.
You can record it in the L format and send it to a friend in the PAL area of Europe, you can take European video software home and watch it on Japanese TV, or you can dub your family's current situation recorded as a movie onto PAL tape. It can be used in a variety of ways, such as sending it to a family member staying in Europe.

In addition, the bidet talent who removed the tuner and RF converter.
If applied to a video tape recorder with an output terminal, it can be used in any country in the world, so if one model is produced, it can be supplied all over the world, making a major contribution to the standardization of production.

As described above, the present invention enables video information to be unified by breaking down the barrier of worldwide television standard systems using VTRs, and is extremely effective in further expanding the uses of video tape recorders.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a top view of a switch display panel used in the present invention, FIG. 3 is an exploded perspective view showing the structure of the switch display panel, and FIG. A block diagram showing one embodiment of the system conversion circuit used in the invention, FIG. 6 is a block diagram showing another embodiment of the invention,
FIG. 6 is a circuit diagram showing the configuration of the system selection circuit used in the present invention.0 2...Tuner, 3...Video input terminal, 4...Input selection switch , 6...
System conversion circuit, 6... Recording processing system, 7...
...Video output terminal, 8...Rotating head, 9.
...Servo system, 1o...Switch display panel, 11...Reproduction processing system, 2o...
Memory, 21...Memory control circuit, 1
9.22...Clock generator, 31...
・Method selection circuit, 32゜33.34...-OR gate, ses...RF converter, 36...
...RF output terminal. Name of agent: Patent attorney Shigetaka Awano and 1 other personmm
Engraving (no changes in content) Figure Series C N Company Expo Procedures Amendment Form) July 1989 258 Display of the incident Person who operates the video tape recorder and corrects the display device Address name related to the incident Representative Patent Application Person: 1006 Kadoma, Kadoma City, Osaka Prefecture (582) Matsushita Electric Industrial Co., Ltd. Akio Tanii 4 Agent Address: 1006 Kadoma, Kadoma City, Osaka Prefecture 571 Correction within Matsushita Electric Industrial Co., Ltd. Date of order (inner route 1; vengeance developed)

Claims (2)

[Claims] (1) Equipped with a servo system and a video signal processing system that can record or reproduce multiple television standard format signals,
and a mode converting circuit that converts one television standard format signal to another television standard format signal, and converts the input television standard format signal to another television standard format signal and records it. A switch connected to a video tape recorder that has a mode for converting the reproduced television standard signal to another television standard signal and outputting it, and used by the operator to specify the name of the desired country or television standard. and a display section that displays a country name or television standard system name by light emission in response to the operation of the switch group; An operating and display device for a video tape recorder, characterized in that it displays a standard system name in a luminescent manner and controls the video tape recorder to perform a desired conversion operation. (2) An electroluminescent element in which a touch switch with a transparent electrode is placed under a printed film displaying the country name or television standard name, and a light emitting body is provided under the touch switch so that a desired part emits light. 2. The video tape recorder operation and display device according to claim 1, further comprising: a country name or a television standard system name operated by said touch switch being illuminated and displayed by light emission from said electroluminescent element.